From Sekanina et al. (1991) ("JPL D-400-450")                                 
                                                                              
This table presents the average transmission characteristics of the           
narrowband filter set manufactured and distributed for IHW use,               
excluding the OH (3085 A) and NH (3365 A) filters.                            
                                                                              
                                                                              
   Table III. Average Characteristics of the IHW Narrowband Filters           
   ================================================================           
                                                                              
 Filter    Lambda     Trans.        Width      Width     Width   Width        
[A]/[A]     [A]                    80% [A]    50% [A]   10% [A]  1% [A]       
                                                                              
3650/80                                                                       
Mic.     3650.1(5.5) 0.368(.050)  57.7(4.3)  82.5(3.4) 126(4.8) 191(6.5)      
And.     3644.2(4.1) 0.295(.029)  68.3(1.3)  88.1(1.7) 125(2.9) 180(4.0)      
                                                                              
3871/50                                                                       
Mic.     3871.6(2.7) 0.264(.030)  31.3(4.4)  44.2(3.9)  70(5.6) 115(8.4)      
And.     3870.2(2.3) 0.312(.031)  30.4(0.6)  42.4(1.4)  64(2.2)  92(1.2)      
                                                                              
4060/70                                                                       
Mic.     4057.9(2.0) 0.458(.009)  62.6(1.9)  76.7(2.0) 100(3.5) 137(5.0)      
And.     4054.1(1.8) 0.487(.020)  59.1(3.5)  70.5(2.9)  91(1.3) 117(2.3)      
                                                                              
4260/65                                                                       
Barr     4259.8(5.8) 0.445(.009)  62.1(1.4)  69.8(0.4)  76(0.5)  79(1.6)      
                                                                              
4845/65                                                                       
Mic.     4848.1(5.6) 0.721(.009)  56.9(1.9)  71.7(1.0) 100(1.6) 143(2.8)      
And.     4849.0(1.1) 0.739(.008)  52.4(1.0)  65.0(0.6)  90(0.4) --------      
                                                                              
5140/90                                                                       
Mic.     5140.4(5.2) 0.629(.010)  74.2(3.5)  85.3(2.2) 108(1.7) 142(3.3)      
And.     5141.3(4.5) 0.739(.017)  71.3(2.7)  82.6(4.2) 106(5.4) 155(---)      
                                                                              
6840/90                                                                       
Barr     6840.3(15.) 0.788(.016)  79.9(4.9)  90.9(4.4) 114(4.2) 146(5.4)      
                                                                              
7000/175                                                                      
Barr     7025.9(3.6) 0.791(.013) 215  (1.3) 228  (1.2) 259(2.2) 311(2.7)      
                                                                              
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In the above table, the columns are as follows:                               
                                                                              
Filter   First line is the nomical Peak Wavelength/FWHM in Angstroms.         
         Successive lines  give the manufacturer of the filters measured:     
                                                                              
           Mic. = MicroCoatings, Inc., of Burlington, Massachusetts           
           And. = Andover Corp of Lawrence, Massachusetts                     
           Barr = Barr Associates, Inc., of Westford, massachusetts           
                                                                              
Lambda   Mean wavelength of peak transmission                                 
                                                                              
Trans.   Peak transmission                                                    
                                                                              
Width    Full widths at 80%, 50%, 10% and 1% of peak transmission.  The       
         value in parentheses is the RMS scatter of this transmission         
         from filter to filter.                                               
                                                                              
Values of "---" are standing in the place of values omitted from the          
original table through obvious or presumed typographical error.               
                                                                              
2006-06-21, A.C.Raugh                                                         
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